Bicycle Trainer Vane Dynamics for Realistic Resistance
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Solution Overview
Problem
Existing bicycle trainers lack effective resistance mechanisms that simulate real cycling conditions, with magnetic resistance systems being complex and fan-based systems providing less realistic resistance.
Innovation Solution
A bicycle trainer design featuring a supporting frame, roller, runner, and vanes, where the vanes are pivotally connected to the runner and rotate outward with increased speed, creating resistance through centrifugal force and enhanced by a damping liquid and elastic member for increased realism and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fan-based resistance system is used, then the device complexity is reduced, but the realism of cycling simulation deteriorates
Solution Approach 1:
The vane is pivotally connected to the runner instead of being fixed, allowing it to dynamically adjust its position. As the runner rotates, centrifugal force causes the vane to swing outward, increasing the resistance gradually. This dynamic adjustment mechanism provides more realistic cycling simulation while maintaining relatively simple device structure.
Solution Approach 2:
The resistance parameter changes dynamically during operation. The vane's angle relative to the airflow changes as it swings outward due to centrifugal force, transforming the resistance from a static value to a dynamically varying parameter that increases with rotational speed, thereby improving simulation realism.
2Adaptability or versatility
If an external magnetism resistance system is used, then the resistance can be adjusted, but the device complexity increases
Solution Approach 1:
The resistance adjustment is achieved through the system's own operational parameters rather than external control mechanisms. The centrifugal force generated during rotation automatically adjusts the vane angle, providing adaptive resistance without requiring additional magnets, motors, or control systems.
Solution Approach 2:
The patent replaces complex electromagnetic resistance systems with a simpler mechanical-cumrical resistance mechanism. Instead of using magnets and electronic controls, the invention uses the natural centrifugal force of rotation combined with elastic member constraints to achieve adaptive resistance.
3Device complexity
If the vane is fixed to the runner, then the structure is simpler, but the resistance increases too abruptly causing safety issues
Solution Approach 1:
The vane is pivotally connected instead of being fixed, allowing it to dynamically adjust its position during rotation. The elastic member enables gradual outward movement rather than abrupt resistance changes, making the system safer while maintaining structural simplicity.
Solution Approach 2:
The elastic member acts as a cushioning element that gradually allows the vane to swing outward as rotation speed increases. This beforehand cushioning mechanism prevents sudden resistance changes that could harm the user, while keeping the overall structure simple.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design provides a more realistic cycling experience with gradually increasing resistance, improving user safety and stability by evenly distributing the load and reducing mechanical failure rates.
Implementation Method 1
The vane is pivotally connected to an edge of the runner. When the runner rotates, the vane swings outward from the shaft member, so that the distance between the vane and the center of the runner increases, thereby increasing the resistance.
Implementation Method 2
the apparatus includes an elastic member, wherein the elastic member resiliently hoops the plurality of vanes
Implementation Method 3
When the runner rotates, the vane swings outward from the shaft member, so that the distance between the vane and the center of the runner increases, thereby increasing the resistance.
Data Source
AI summary
A bicycle trainer is disclosed. The bicycle trainer includes a supporting frame, a roller, a runner and at least one vane. The supporting frame suspends at least one bicycle wheel. The roller is connected to the supporting frame via a shaft member. The roller is driven by the bicycle wheel. A runner is coaxially connected to the roller via the shaft. The vane is pivotally connected to an edge of the runner.